Tulsa Talk Around 854.9625

[GlacierClipper]

Tulsa frequency 854.9625 is toned for 143, the same as 856.2125.

Heard on June 9, 2004; while officers were in the Albertson's parking lot at 41st and Peoria.



Maybe the other talk around frequencies are toned for 143.

 

[peterjmag]

Clipper I'm glad that you confirmed that 854.9625 is talkaround. I have said that for a long time and some people used to think otherwise. Thank you for confirming it. I am also glad you got the DCS code. I had it for awhile but lost it and I never got to get again until now. Thanks for the great scanning work...

P.J. Maguire

 

[GlacierClipper]

You are welcome! Now that little problem with the tone is out of the way and solved!

 

[okla-lawman]

Yes that is talk around. What is DCS code??

 

[K5MAR]

I'll just copy this whole thing here, from an explaination I just gave in another forum>

PL is a Motorola trademarked term for CTCSS, or Continuous Tone Coded Squelch System. This is a subaudible tone (67 to 250.3 hertz) transmitted with the carrier by a properly-equipped radio, and is used to open the squelch on a properly-equipped receiver. Often used to control access to a repeater system, it was originally developed to allow more than one user on a single radio frequency. Different users would have different tones (there are 38 or more CTCSS tones) so they wouldn't have to hear each other's radio traffic. Of course this still doesn't allow two different users on the same frequency at the same time. Removing the mic from the hanger of a mobile radio, or pressing a button on the front of a base radio would "defeat" or turn off the tone squelch and allow the users to hear if the channel was already in use before they transmitted. A digital version - DCS or Digital Coded Squelch (DPL - Motorola trademark) has also been implimented using a digital signal instead of analog tones, but is currently less common.

Mark S.

 

[okla-lawman]

So do i need to put a pl tone to decode it in a scanner or just for those wanting to transimit??

 

[K5MAR]

No, the CTCSS/DCS code, on the receive end is used to filter the traffic you hear. On the Tulsa system it's not likely you'll need to set the tone, as there shouldn't be any other stations close enough to interfere. For those of us who have CTCSS/DCS capable scanners, it's another piece of information that's useful to have. You're more likely to need it in the VHF and UHF bands, where multiple users in close proximity are likely to be authorized on the same frequency. A good example of this in Oklahoma would be 155.490, 155.760, or 154.130 MHz.

Another good use is to help identify a previously unknown user on a particular frequency. For instance, the FBI always uses/used 167.9 for it's standard tone. So if you were scanning the 167 MHz range, and a previously unused frequency suddenly became active and had that tone, you could be pretty sure that it was the FBI.

Mark S.


Mark S.

 

[okla-lawman]

yes I understand pl tones and the principal. There is actual some freqs I have programmed in with pl tone on the receive side. most repeaters dont have that. I was pretty sure I had picked up talkaround before but then thought it might of been ITAC instead as some are chiit chatting on theat.

 

[GlacierClipper]

ITAC Frequencies

The tone for ITAC in the Tulsa area has been 156.7 during some activity.

 

[K5MAR]

yes I understand pl tones and the principal. There is actual some freqs I have programmed in with pl tone on the receive side. most repeaters dont have that. I was pretty sure I had picked up talkaround before but then thought it might of been ITAC instead as some are chiit chatting on theat.

Then I guess I misunderstood your question. If you could restate it, perhaps I can help.

Mark S.

 

[okla-lawman]

I know what pl tones etc are just never heard of dcs. I couldnt understand why they were making a big deal about it. You dont need it to scan unless they are trying to transmit... but then since it is non repeatered it must be that maybe different users may have different dcs codes. Of course if they are trying to transmit beware of the vans with all
the antennas..especially the 4 moued in a square.